Rose,

Hi. That's the best way to start a letter, I suppose. Friendly greeting. Thing is, by now, I don't know whether I should be friendly or not. I mean, who knows what's happened to you by now? You could have been eaten or transmuted or killed or … worse. And much as I'd like to pin the blame on him, I know in my heart that it wasn't the Doctor's fault.

I want to be jealous of him. I suppose in some ways I am. He's got everything I haven't – exciting life, cool place to live, charm, intelligence, a time machine, you – while I'm stuck here on the estate with Jackie, spending every waking hour waiting for you to come home, Rose. I've spent months waiting for you, looking down alleys, on street corners, on tops of building, anywhere I might find a whacking great blue box with you and the Doctor inside it. Just my luck, isn't it – you go off with someone who's tall, dark and handsome, and when he gets killed, he just comes back better-looking. But I've told you before, Rose – you can always rely on me. I know I'm not like him, but that's good in a way – I'm not gonna go changing my face.

I'm always gonna be here for you, Rose. You must know by now how much I love you. Even when you went off with Jimmy Stone, I waited for you. I didn't judge you for falling in love with him instead of me. Why wouldn't you? He was cool. He was a legend on the estate. Plus he was older. Suppose I can see the irony in that now – you dumping me for older guys. Last time, there was a four year age gap. This time, it's nearly nine hundred years. You certainly know how to pick them, don't you? Even me.

Did you ever love me, Rose? No idea why I'm asking that, it's not like you can answer. By the time you read this, I could be dead. You could be reading this in twenty million years' time. Like in that film – Back To The Future. The one where he gets a letter from the guy who accidentally goes back in time. On the other hand, you might get this tomorrow, and then I'll look like a right idiot. But if you did get it tomorrow, at least you'd be able to answer me. Did you ever love me? Did you ever love me the way that I love you?

Oh, I know you'll tell me that you did, and I'll probably believe you because that's what I do – I stick by you, no matter what happens. The next time I see you, you could be eighty years old and I'll probably still stick by you. I'll probably still think you're beautiful. Because you are, Rose. You're the most beautiful, passionate, intelligent girl I've ever met. And don't moan and chuck the 'I haven't got A levels' argument at me, because you are intelligent. You went for him instead of me. You wouldn't have done that if you weren't clever. You knew that he'd be able to offer you so much more than I ever could. And I don't know if you love him (hell, I don't think even you know if you love him) but if he loves you half as much as I do then you're a luckier girl than I first thought.

You deserve him, Rose. You really do. Because, even though I don't know exactly how he feels about you, I know he would do anything – absolutely anything – to keep you out of harm's way. And maybe that's his version of love. I dunno, he's an alien, he might be doing it for fun for all I know. Still, as long as he keeps you safe, you're lucky to have him.

Take care, Rose. Take care ofhim, and take care of yourself. He needs you more than he lets on, and I need you more than anything.

See you.

Mickey